Biology News
Stem cell scientists chew on the mysteries of jaw development - Phys.Org


Phys.Org
In the study published in Developmental Cell, first author Lindsey Barske and colleagues report that two related genes, called Nr2f2 and Nr2f5, pattern the jaw by regulating the timing by which stem cells generate skeletal cells. As in our bodies, the ...

Weight flux alters molecular profile, Stanford-led study finds - EurekAlert (press release)


EurekAlert (press release)
As people pack on pounds or shed excess weight, they exhibit notable changes in their microbiome, cardiovascular system, immune system and levels of gene expression, the study found. The researchers integrated a slew of "omics" profiling techniques to ...
Cosmos
The Scientist

Chameleon Bones Glow in the Dark, Even Through Skin - National Geographic


National Geographic
"We could hardly believe our eyes when we illuminated the chameleons in our collection with a UV lamp," lead author David Prötzel, a doctoral student at the Bavarian State Collection of Zoology, says in a statement. "And almost all species showed blue ...

Bones and Skeletal System

Washington, District of Columbia - United States

Many people are familiar with a hambone as a cross-section of a typical bone. The center of the bone is filled with marrow, and this is surrounded by the hardened bone tissue itself. If you would examine a bit of this hard bone tissue under a microscope, it would look like the picture to the right. In bone, the extracellular matrix is composed of collagen with Ca3(PO4)2 deposited in it. Note that since vitamin C is needed for collagen synthesis, getting a little extra while a broken bone is healing would probably be a good idea. Bone tissue is composed of repeating, circular units called Haversian systems. Within each Haversian system, there is a central canal where blood vessels and nerves can be found. This is surrounded by concentric layers of the matrix material called lamellae. The darkly-stained spots are spaces called lacunae which contain the osteocytes.

Related
Skeletal System
United States

Skeletal system is the biological system providing support in living organisms. Skin, muscle and bones allow movement. Skin - pliable covering. Muscles do actual moving. Bones give anchor to move against. The skeleton functions not only as the support for the body but also in haematopoiesis, the manufacture of blood cells that takes place in bone marrow. This is why people who have cancer of the bone marrow almost always die. It is also necessary

Medpedia:Skeletal System
United States

Humans are vertebrates, animals that have a vertebral column or backbone. They rely on a sturdy internal frame that is centered on a prominent spine. The human skeletal system consists of bones and cartilages, and accounts for about 20% of body weight. Most adults have 206 bones.

Healthline: Skeletal System
United States

The skeletal system is a living, dynamic, bony framework of the body, with networks of infiltrating blood vessels. Inside every person is a skeleton, a sturdy framework of about 206 bones that protects the body's organs, supports the body, provides attachment points for muscles to enable body movement, functions as a storage site for minerals such as calcium and phosphorus, and produces blood cells.

Human Anatomy Online: Skeletal System
United States

Features an interactive diagram of the human skeleton.

Human Body's Skeletal System Theme Page
Canada

Links to sites with information about the human skeletal system.

Canada

A discussion and thorough critique of claims that human bones have been found in context with Carboniferous age geological formations.

United States

Animation showing the skeleton with each bone identified.

BARF: Bones and Raw Food
Canada

About putting your dog on a raw food diet.

Living Skeleton: A Tour of Human Bones
United States

Explore the human skeleton with this online photo tour. Eight sections represent different areas of the human body, with photographs of disarticulated bones as well as X-ray images. From the National Health Museum.

Piltdown Man: The Bogus Bones Caper
United States

Home page for Piltdown man, a paleontological "man who never was."